In it, CCA doesn’t acknowledge the allegations but agrees to increase staffing, investigate all assaults and make other sweeping changes at the lockup south of Boise. If the company fails to make the changes, the inmates can ask the courts to force CCA to comply.

The inmates, represented by the ACLU, sued last year on behalf of everyone incarcerated at the CCA-run state prison. They said the prison was so violent it was dubbed “Gladiator School,” and that guards used inmate-on-inmate violence as a management tool and then denied prisoners medical care as a way to cover up the assaults.

CCA has denied all the allegations as part of the settlement, but the agreement is governed under the Prison Litigation Reform Act, which only applies in cases in which prisoners’ Constitutional rights have been violated.

The agreement came after both sides spent three days in federal mediation sessions last week.

In the lawsuit, the inmates cited an Associated Press investigation from three years ago that found the private prison had more cases of inmate-on-inmate violence than all other Idaho prisons combined.

“The unnecessary carnage and suffering that has resulted is shameful and inexcusable,” the ACLU wrote in the lawsuit. “ICC not only condones prisoner violence, the entrenched culture of ICC promotes, facilitates, and encourages it.”

While the prison is owned by the state, it is run for a profit by CCA under a contract with the Idaho Department of Corrections. The inmates claimed the company made decisions based on profit, rather than on “responsible administration of the prison.”

Under the settlement, CCA has agreed to leave more prison beds open so it can easily move threatened inmates to new cellblocks when necessary. It also agreed to report all assaults that appear to amount to aggravated battery to the Ada County Sheriff’s Office, to increase the level of training given to guards and to discipline staffers who don’t take appropriate measures to stop or prevent assaults.